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C library function to perform sort
...arison function.
It does its magic and your array is sorted in-place. An example follows:
#include <stdio.h>
#include <stdlib.h>
int comp (const void * elem1, const void * elem2)
{
int f = *((int*)elem1);
int s = *((int*)elem2);
if (f > s) return 1;
if (f < s) r...
Shortest distance between a point and a line segment
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How to mock the Request on Controller in ASP.Net MVC?
...q:
var request = new Mock<HttpRequestBase>();
// Not working - IsAjaxRequest() is static extension method and cannot be mocked
// request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
// use this
request.SetupGet(x => x.Headers).Returns(
new System.Net.WebHeaderCollect...
What is the difference between . (dot) and $ (dollar sign)?
...aring after it will take precedence over anything that comes before.
For example, let's say you've got a line that reads:
putStrLn (show (1 + 1))
If you want to get rid of those parentheses, any of the following lines would also do the same thing:
putStrLn (show $ 1 + 1)
putStrLn $ show (1 + 1)...
C++形参与实参的区别（实例解析） - C/C++ - 清泛网 - 专注C/C++及内核技术
...改变，而实参中的值不会变化。
参考如下示例：
void Exchg1(int x, int y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg1:x=%d,y=%d\n",x,y);
}
void Exchg2(int &x, int &y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg2:x=%d,y=%d\n",x,y);
}
void Exchg3(int *...
Macro vs Function in C
I always saw examples and cases where using a macro is better than using function.
11 Answers
...
How come a non-const reference cannot bind to a temporary object?
...owed to get non-const reference to a temporary object,
which function getx() returns? Clearly, this is prohibited by C++ Standard
but I am interested in the purpose of such restriction, not a reference to the standard.
...
asynchronous vs non-blocking
...and non-blocking calls? Also between blocking and synchronous calls (with examples please)?
12 Answers
...
Convert a Python list with strings all to lowercase or uppercase
... basically take the form of [function-of-item for item in some-list]. For example, to create a new list where all the items are lower-cased (or upper-cased in the second snippet), you would use:
>>> [x.lower() for x in ["A","B","C"]]
['a', 'b', 'c']
>>> [x.upper() for x in ["a","...
How can I multiply and divide using only bit shifting and adding?
... = 10101_2 * 5
= 21 * 5 (Same as initial expression)
(_2 means base 2)
As you can see, multiplication can be decomposed into adding and shifting and back again. This is also why multiplication takes longer than bit shifts or adding - it's O(n^2) rather than O(n) i...